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# and <http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
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FORTIFY=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
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# <https://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/>
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# The sanitizing options are available in GCC 4.9 and above.
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ifeq ($(shell test $(shell $(CC) -dumpversion) \> 4.9-; echo $$?),0)
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SANITIZE:=-fsanitize=address -fsanitize=undefined -fsanitize=shift \
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-fsanitize=integer-divide-by-zero -fsanitize=unreachable \
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-fsanitize=vla-bound -fsanitize=null -fsanitize=return \
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-fsanitize=signed-integer-overflow
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# GCC 5.3 has some more sanitizing options
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ifeq ($(shell test $(shell $(CC) -dumpversion) \> 5.3-; echo $$?),0)
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SANITIZE+=-fsanitize=bounds -fsanitize=alignment \
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-fsanitize=object-size -fsanitize=float-divide-by-zero \
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-fsanitize=float-cast-overflow -fsanitize=nonnull-attribute \
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-fsanitize=returns-nonnull-attribute -fsanitize=bool \
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ALL_SANITIZE_OPTIONS:=-fsanitize=address -fsanitize=undefined \
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-fsanitize=shift -fsanitize=integer-divide-by-zero \
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-fsanitize=unreachable -fsanitize=vla-bound -fsanitize=null \
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-fsanitize=return -fsanitize=signed-integer-overflow \
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-fsanitize=bounds -fsanitize=alignment \
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-fsanitize=object-size -fsanitize=float-divide-by-zero \
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-fsanitize=float-cast-overflow -fsanitize=nonnull-attribute \
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-fsanitize=returns-nonnull-attribute -fsanitize=bool \
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# Check which sanitizing options can be used
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SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
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echo 'int main(){}' | $(CC) --language=c $(option) /dev/stdin \
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-o /dev/null >/dev/null 2>&1 && echo $(option)))
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LINK_FORTIFY_LD=-z relro -z now
added
removed
Makefile
